Nao Inao updated the Development Environment documentation in the kufu/hello-world repository to reflect a new company value statement, shifting the product development philosophy toward customer-centric innovation. By revising the core messaging from '人が欲しいと思うものをつくろう' to '人が欲しいものを超えよう', Nao clarified engineering priorities and improved onboarding materials for future developers. The work involved careful documentation discipline, Git-based change management, and attention to localization nuances. Using Astro and JavaScript, Nao ensured the documentation changes were seamlessly integrated, resulting in clearer guidance for the engineering team and better alignment between technical work and evolving business objectives.